Answer:
The traveler can plan such a tour in 3003 ways.
Step-by-step explanation:
The order that the cities are chosen is not important, since it is chosen by the company and not by the traveler. So we use the combinations formula to solve this question.
Combinations formula:
is the number of different combinations of x objects from a set of n elements, given by the following formula.

In this problem, we have that:
Combinations of 5 cities from a set of 15. So

The traveler can plan such a tour in 3003 ways.
Answer:
2/8
Step-by-step explanation:
2/8 porque ahy 8 y 2 estan coloridas.Si gustarias simplifar seria .25
Answer:
Approximate only
Step-by-step explanation:
the perfect square smaller than 1.4 is 1, because 
Take the difference between the two, 1.4 -1 = 0.4
Put the whole with 1. the part will be as follow:

Note: just approximate!! with calculator, it is 1.18321
Answer:
-1/3
Step-by-step explanation:
y2-y1 divided by x2-x1
6-8=-2(y slope)
4--2=6(x slope)
-2/6=-1/3 or -0.3333